 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Large transport suffered failure of both captain and first officer attitude direction indicator instruments.
| Attributes | |
| ACN | 124732 |
| Time | |
| Date | 198909 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ecg |
| State Reference | NC |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other cruise other |
| Route In Use | enroute : atlantic enroute airway : ar8 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 13000 flight time type : 3500 |
| ASRS Report | 124732 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Dual ADI failure in turn on ar route using omega coupled to autoplt, both ADI's precessed in 25 degree bank during a right turn. This failure had no other indication of flags or lights. It was recognized with outside visual reference when the aircraft was not turning and attitude indicated a 25 degree bank turn on both pilot and first officer ADI's. Fortunately we were VFR. Aircraft was recovered to VFR destination.
Original NASA ASRS Text
Title: LGT SUFFERED FAILURE OF BOTH CAPT AND FO ATTITUDE DIRECTION INDICATOR INSTRUMENTS.
Narrative: DUAL ADI FAILURE IN TURN ON AR ROUTE USING OMEGA COUPLED TO AUTOPLT, BOTH ADI'S PRECESSED IN 25 DEG BANK DURING A RIGHT TURN. THIS FAILURE HAD NO OTHER INDICATION OF FLAGS OR LIGHTS. IT WAS RECOGNIZED WITH OUTSIDE VISUAL REFERENCE WHEN THE ACFT WAS NOT TURNING AND ATTITUDE INDICATED A 25 DEG BANK TURN ON BOTH PLT AND F/O ADI'S. FORTUNATELY WE WERE VFR. ACFT WAS RECOVERED TO VFR DEST.
Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.